public Task <object> GetDataAsync()
{
while (!modbusClientAlive)
{
try
{
modbusClient.Init();
modbusClientAlive = true;
}
catch (Exception ex)
{
Console.WriteLine($"[EXCEPTION] Exception while instantiating Modbus client: {ex.Message}");
Console.WriteLine("\nSleeping for 15 seconds before retrying to talk to Modbus host...\n");
Task.Delay(TimeSpan.FromSeconds(15)).Wait();
}
}
var ct = new CancellationToken();
Task <object> t = Task.Run <object>(async() =>
{
var voltage = Array.Empty <short>();
var current = Array.Empty <short>();
var hardwareId = String.Empty;
try
{
voltage = await modbusClient.ReadRegistersAsync(40001, 3);
current = await modbusClient.ReadRegistersAsync(41001, 3);
hardwareId = "Function Code 0x2b (43)";
}
catch (Exception ex)
{
Console.WriteLine(
$"[EXCEPTION] Exception while calling ReadRegistersAsync(): {ex.Message}");
Console.WriteLine(
"\nSleeping for 5 seconds before retrying...\n");
Task.Delay(TimeSpan.FromSeconds(5), ct).Wait(ct);
}
return(new
{
deviceId,
voltage,
current,
hardwareId
});
}, ct);
if (t.Wait(9000, ct))
{
return(t);
}
Console.WriteLine("Aborting modbus Task, took too long to return.");
//Console.WriteLine("Restarting collector...\n");
//Assembly a = Assembly.GetExecutingAssembly();
//System.Diagnostics.Process.Start("dotnet.exe", a.Location);
//Environment.Exit(-2);
return(null);
}
public void SocketTimeoutTest()
{
Console.WriteLine("Running SocketTimeoutTest...");
int TEST_TIMEOUT = 6000;
int MODBUS_CALL_TIMEOUT = 3000;
Int32 port = 50222;
string v4Loopback = ("127.0.0.1");
TcpListener server = new TcpListener(IPAddress.Parse(v4Loopback), port);
server.Start();
CancellationTokenSource cts = new CancellationTokenSource(TEST_TIMEOUT);
CancellationToken ct = cts.Token;
var t = Task.Run(() =>
{
server.AcceptTcpClientAsync();
ModbusClient mc = new ModbusClient(v4Loopback, port, MODBUS_CALL_TIMEOUT);
mc.Init();
short[] r = mc.ReadRegistersAsync(4304, 2, 1).Result;
}, ct);
try
{
t.Wait(ct);
}
catch (OperationCanceledException)
{
Assert.True(false, "The call to ReadRegistersAsync() did not return " +
$"within expected time window of {MODBUS_CALL_TIMEOUT / 1000} seconds.");
}
catch (Exception ex)
{
if (ex.InnerException.InnerException is TimeoutException ||
ex.InnerException.InnerException is IOException)
{
// We expect a TimeoutException or IOException if ReadRegistersAsync() adheres to our timeout
Assert.True(true);
}
else
{
throw;
}
}
finally
{
server.Server.Close();
server.Server.Dispose();
}
}
public async Task <TelemetryPoint> GetDataAsync()
{
string iotHubDeviceId = AppSettings.iotHubDeviceId;
decimal temperature;
float[] analogInput;
bool[] digitalInput;
try
{
if (!modbusClientAlive)
{
modbusClient = new ModbusClient(
AppSettings.modbusHost,
AppSettings.modbusPort);
modbusClient.Init();
modbusClientAlive = true;
}
analogInput = await modbusClient.ReadRegistersFloatsAsync(
AppSettings.temperatureInputOffset,
AppSettings.temperatureInputCount,
AppSettings.unitIdentifier);
temperature = decimal.Round(
(decimal)analogInput[0], 3); // 3 decimals
digitalInput = await modbusClient.ReadInputStatusAsync(
AppSettings.digitalInputOffset, // 10001 + offset
AppSettings.digitalInputCount,
AppSettings.unitIdentifier);
}
catch (Exception ex)
{
Misc.LogException($"Exception while calling ReadRegistersAsync(): {ex.Message}\n" +
$"Stack Trace --\n{ex.StackTrace}");
modbusClientAlive = false;
return(null);
}
TelemetryPoint sensorData = new TelemetryPoint()
{
iotHubDeviceId = iotHubDeviceId,
temperature = temperature,
digitalInput = digitalInput
};
return(sensorData);
}
public async Task InitAsync(
string host,
int port,
string iotHubDeviceConnStr,
DesiredPropertyUpdateCallback desiredPropertyUpdateCallback)
{
modbusClient = new ModbusClient(host, port);
try
{
modbusClient.Init();
modbusClientAlive = true;
}
catch (Exception ex)
{
Misc.LogException($"Exception while instantiating Modbus client: {ex.Message}");
}
deviceClient = DeviceClient.CreateFromConnectionString(iotHubDeviceConnStr);
Twin twin = new Twin();
try
{
twin = await deviceClient.GetTwinAsync();
if (twin.Properties.Desired["pollingInterval"] != PollingInterval)
{
Misc.LogDebug("Setting new pollingInterval: " +
$"{twin.Properties.Desired["pollingInterval"]} seconds");
try
{
PollingInterval = twin.Properties.Desired["pollingInterval"];
}
catch (Exception ex)
{
Misc.LogException($"Unable to set pollingInterval: {ex.Message}");
}
}
await deviceClient.SetDesiredPropertyUpdateCallbackAsync(desiredPropertyUpdateCallback, null);
}
catch (Exception ex)
{
Misc.LogException(ex.Message);
}
}
public async Task ReadRtTagAsync()
{
try
{
if (!modbusClient.Connected)
{
modbusClient.Init();
}
foreach (var block in settings.ReadBlocks)
{
var data = await ReadBlockAsync(block);
ParseBlock(block, data);
}
prevException = null;
processInfo.ScanDateTime = DateTime.Now;
processInfo.ScanCounter += 1;
processInfo.ScanRetry = 0;
processInfo.ScanLastErrror = "";
await processInfo.SetValuesFromPropertiesAsync(new[] { nameof(processInfo.ScanCounter) });
}
catch (Exception e)
{
if (e.Message != prevException?.Message)
{
logger.LogError(e, "Scan Fail!");
prevException = e;
processInfo.ScanLastErrror = e.Message;
}
processInfo.ScanRetry += 1;
processInfo.ScanCounter = 0;
modbusClient.Terminate();
}
}
public async Task InitAsync(string host, int port,
string deviceConnStr,
DesiredPropertyUpdateCallback desiredPropertyUpdateCallback,
string currentDeviceid = "modbusdevice")
{
modbusClient = new ModbusClient(host, port);
deviceId = currentDeviceid;
try
{
modbusClient.Init();
modbusClientAlive = true;
}
catch (Exception ex)
{
Console.WriteLine($"[EXCEPTION] Exception while instantiating Modbus client: {ex.Message}");
Environment.Exit(-1);
}
deviceClient = DeviceClient.CreateFromConnectionString(deviceConnStr);
var twin = await deviceClient.GetTwinAsync();
if (twin.Properties.Desired["pollingInterval"] != PoolingInterval)
{
Console.WriteLine("[DEBUG] Setting new pollingInterval: " +
$"{twin.Properties.Desired["pollingInterval"]} seconds");
try
{
PoolingInterval = twin.Properties.Desired["pollingInterval"];
}
catch (Exception ex)
{
Console.WriteLine($"[EXCEPTION] Unable to set pollingInterval: {ex.Message}");
}
}
await deviceClient.SetDesiredPropertyUpdateCallbackAsync(desiredPropertyUpdateCallback, null);
}
